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Updated: Apr 7, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
A radio-frequency coil for the microwave characterization of vortex dynamics in thin film superconductors
Pedro-de-Jesús Cuadra-Solís1, Antoni Fernández-Martínez1, Joan Manel Hernàndez1
1Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain and Institut de Nanociència i Nanotecnologia INUB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, 08028 Barcelona, Spain.
Abstract:
A radio-frequency coil for the experimental investigation of the magnetic properties of thin superconducting films under microwave fields at different values of temperature and dc magnetic field has been developed. The system has been used for low-temperature microwave frequency-dependent magnetization measurements in a Pb thin film with an engineered periodical antidot array. The characteristic frequencies and the electric and magnetic fields of the resonant system formed by a multi-turn coil with a sample loaded in its core are estimated using the helical approach. A good agreement of the calculated values with those recorded in swept-frequency spectra is obtained. The relation between the characteristics of the resonant structure and the frequency-driven magnetic response of the sample at different nominal microwave powers documents the capability and sensitivity of the layout.
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